Identification_Information:
Citation:
Citation_Information:
Originator: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Publication_Date: 20090930
Title: CRED Fish Biomass Estimates at Tutuila Island, 2004
Other_Citation_Details: Format - Video imagery, track line navigation files, and log sheets
Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila_optical.htm
Description:
Abstract: Fish biomass data were collected using a Towed Optical Assessment Device (TOAD), an underwater sled
equipped with an underwater digital video camera and lights. Data were collected at American Samoa,
Tutuila Island to support Benthic Habitat Mapping efforts.
Purpose: These data will provide optical observations that will be correlated with bathymetry and acoustic backscatter imagery
to create a fish biomass map of Tutuila Island. Refer to supplemental information for description of
instrument and survey.
Supplemental_Information: Tutuila is the largest of seven islands in American Samoa at 142.3 sq. km. Volcanic in
origin, it reaches a height of 653m at Matafao Peak. Tutuila is centered at 14.30 degrees N, 169.75 degrees W,
has 101.3 km of coastline and an estimated 36.2 sq. km of reef area. The port of Pago Pago is a collapsed crater
and is one of the largest natural ports in the Pacific. Pago Pago contains a tuna cannery which is a hub of a large
purse-seining tuna fishing fleet. The cannery outputs large amounts of nutrients as byproduct into the waters of
Pago Pago harbor. The human population of Tutuila in 1990 was 45,043. It is considered a high island and contributes
significant nutrient and sediment runoff to coastal waters. Tutuila's waters are protected by the 0.7 sq. km
Fagatele Bay National Marine Sanctuary, as well as by the National Park of American Samoa, which covers the
north-central part of the island and approximately 5 sq. km of coastline.
Mobile fauna data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with underwater video camera and lights. These data are used to provide fish count and biomass maps where benthic habitat classification has been completed. Camera sled deployments were conducted at night, usually between 1800 and midnight. The duration of each tow varied but averaged about 40 minutes of bottom time at a given location. The
camera sled was deployed from the port J-frame mounted amidships on the NOAA Ship Oscar Elton Sette. At each station
the ship was positioned with the wind on the port side and drifted downwind; occasional light turns were applied to
the ship's screws if necessary to reduce the ship's motion. The TOAD was lowered slowly to the bottom by the deck
crew using a capstan. The operator monitored a live video feed from the camera and began recording data on a video
tape recorder. When the camera reached bottom the deck crew was notified by radio to stop lowering. The operator
continued to monitor the vehicle and provided commands to raise or lower it to keep the camera just above the bottom.
Equipment Description: The TOAD was deployed from the lower arm of the vessel's port side J-frame. The TOAD is a
camera sled based on the Guildline MiniBat model 8820 tow body. The frame has been extensively modified from
its original configuration and was equipped with an ROS model 54-00100-13 color underwater video camera as the
primary data collection instrument. The ROS camera was mounted to point at approximately a 45 degree angle
toward the seafloor. A Deep Sea Power and Light model 2050 MultiSeaCam low-light color video camera was also mounted
on the sled and aimed straight ahead. The signal from this camera was fed to a second video monitor to provide
warning of underwater obstructions the sled might be headed for. Illumination was provided by two 500 W DeepSea
Power & Light Multi-SeaLite model 1050 underwater lights mounted on the original sled frame. The lights were located
near the base and each side of the sled to provide the maximum possible horizontal distance from the ROS camera.
Cable between the sled and the surface consisted of a underwater electrical cable (cable 1, blue in color) with a
separate load-bearing line to support the sled frame. The electrical cable was clipped to the line at regular
intervals upon deploymentand removed upon recovery. The load-bearing line was led to the starboard capstan on the aft deck. All TOAD surface components were located in the Dry Lab in an equipment rack on the after bulkhead.
Name & address of person collecting data:
John Rooney
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu, HI 96818
Data Files: Video data were recorded on a video tape recorder. The position
of the camera sled was recorded in WGS-84 using Guildline MiniBat In-Tow
data acquisition software and a data feed from a shipboard Northstar
Chartplotter.
File naming convention: Each tow is given a name consisting of a 3-
letter designator for the island area followed by a tow number, which
increments by one for each new tow around that island. During
OES0402 (NOAA Ship Oscar Elton Sette's 2nd cruise in calendar year
2004) the tows would being with TUT04001. For following
cruises, the tow numbers will increment by 100, so the first tow on
the next cruise to Tutuila will be tow number TUT04101. Video tape labels,
the navigation files (*.glo) and paper log forms are annotated with
the tow name and number, e.g., tut04012. If the navigation file is
edited during processing the file name has a suffix 'a' added. For
example, for a navigation data file named tut04012a.glo, the 'a
would indicate that metadata were extracted from the navigation
data and recorded to a file with the same name as the navigation file
except that a file type of '.met' was appended; for example,
tut04012a.glo.met.
Time Correlation: All times are based on UTC. Two clocks were manually
synchronized prior to starting data collection; the clock in the video character
generator that was used to annotate the video tape, and the clock in the
TOAD data acquisition computer. These clocks were set to UTC at the
beginning of each evening's operations.
Resource Description: Digital video imagery that is geo-referenced to navigation
files.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040219
Ending_Date: 20040226
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -170.92
East_Bounding_Coordinate: -170.49
North_Bounding_Coordinate: -14.20
South_Bounding_Coordinate: -14.38
Keywords:
Theme:
Theme_Keyword_Thesaurus: CRCP Project
Theme_Keyword: Benthic Habitat Mapping and Characterization - American Samoa and PRIA
Theme_Keyword: 1084
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Photographic analysis > Videography
Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Mapping
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Tethered Optical Assessment Device (TOAD)
Theme_Keyword: Underwater video
Theme_Keyword: OES0402
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Fish Stock Characteristics
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: 007
Theme_Keyword: biota
Theme_Keyword: 002
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword: OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)
Place_Keyword: COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)
Place_Keyword: OCEAN BASIN > Pacific Ocean > Tutuila Island > Pago Pago (14S170W0008)
Place_Keyword: COUNTRY/TERRITORY > United States of America > American Samoa > Tutuila Island > Pago Pago (14S170W0008)
Place_Keyword: OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)
Place_Keyword: COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000)
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Tutuila
Place_Keyword: American Samoa
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: AmSam
Access_Constraints: None
Use_Constraints: Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as
the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: John Rooney
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Browse_Graphic:
Browse_Graphic_File_Name: http://www.soest.hawaii.edu/pibhmc/amsamoa_images/tut_toad_mf_445.jpg
Browse_Graphic_File_Description: Tutuila, American Samoa: TOAD Tows and Multibeam Bathymetry
Browse_Graphic_File_Type: JPEG
Data_Set_Credit: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science
Center (PIFSC), National Oceanic and Atmospheric Administration (NOAA)
Security_Information:
Security_Classification_System: Not applicable
Security_Classification: Unclassified
Security_Handling_Description: Not applicable
Data_Quality_Information:
Logical_Consistency_Report: Unspecified
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: The horizontal position accuracy for the camera sled position is estimated at
100 meters. There are three primary sources of this error. The ship's positioning is based on GPS SPS, often
called standalone or non-differential GPS positioning. SPS has a measured accuracy of under 5 meters. The
position of the GPS antenna is used; no attempt is made to translocate this position to that of the tow block
from which the camera is deployed. The difference between the tow block and the antenna is about 14 meters. The
largest source of error is uncertainty associated with the sled's position relative to the tow block.
Lineage:
Process_Step:
Process_Description: After a tow was completed the video tape data was reviewed by spot checking the master and
backup tape to verify that data were recorded. Navigation data were copied from the acquisition computer to the
data archive. A metadata extractor (gloFilter.py, version 3/06) was run to summarize the navigation data and test
for errors. If errors were detected they were corrected or flagged as appropriate and a new data file was made.
This file's header was updated to document what type of processing occurred. A metadata file was recorded in the
data archive in the same location as the navigation data. Processed navigation data were then read into ArcView 3.2
shapefiles using an ArcView Avenue script named TOAD.Import.Playback, version 9/25/01, written by Ronald Hoeke.
TOAD video were classified for benthic habitat type to create Optical Validation maps to interpret acoustically
derived data layers. These classified points were imported into a Microsoft Access 2003 database. All fish present
during 15 second intervals before and after these positions were recorded and identified. Using LW coefficients
derived from fishbase.org and size estimates from video, total biomass was calculated for a given point. An area
of 0.0012 hectares per point observation was assumed based on average distances traveled between points as well as
average width of field of view. A table with position, island, biomass(tonnes/hectare), and number of fish was
exported from MS Access into ArcGis v9.3. This file was exported as a shapefile. A column with biomass data was
symbolized using layer file MF_Biomass.lyr to create Fish Biomass Estimates map.
Process_Date: 20040226
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: No correction
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: John Rooney
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Resource_Description: Downloadable Data
Distribution_Liability: These data are not to be used for navigational purposes.
NOAA makes no warranty regarding these data, expressed or implied, nor
does the fact of distribution constitute such a warranty. NOAA cannot assume
liability for any damages caused by any errors or omissions in these data, nor
as a result of the failure of these data to function on a particular system.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Information_Content: Each comma-delimited record contains information on the UTC date
and time, latitude, longitude, velocity north and east of the ship, water
depth of the seafloor below the transducer (to find the total depth
from the water surface to the seafloor add 5 m to these values to
account for the depth of the tranducer) layback, and wing angle.
List of navigation files:
Shapefiles showing camera sled tracks have a three letter location
designator (in this case they are Tut) followed by sequential
numbers starting at 101 and running through 149, except as noted
below. Each shapefile (with a .shp extension) is accompanied by files
of the same name but with .dbf, .shx, and.prj extensions. Only
the shapefiles are listed below, but the accompanying files are both
necessary and do exist in each case.
tut04001.shp tut04031.shp (31 files)
tut04031a.shp (1 file)
tut04032.shp tut04037.shp (6 files)
tut04039.shp tut04049.shp (11 files)
List of glo files:
tut04001-04049.glo
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila_optical.htm
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Digital_Form:
Digital_Transfer_Information:
Format_Name: mini digital video and VHS
Format_Information_Content: A total of 47 separate segments of video data are available covering
25.6 linear kilometers of seabed.
These data were recorded on 9 video tapes
List of video tapes:
tut04001-006, VHS- Master, Mini DV- Master and Backup
tut04007-012, VHS- Master, Mini DV- Master and Backup
tut04013-017, VHS- Master, Mini DV- Master and Backup
tut04018-019, VHS- Master, Mini DV- Master and Backup
tut04020-026, VHS- Master, Mini DV- Master and Backup
tut04027-030, VHS- Master, Mini DV- Master and Backup
tut04031-036, VHS- Master, Mini DV- Master and Backup
tut04037-044, VHS- Master, Mini DV- Master and Backup
tut04045-049, VHS- Master, Mini DV- Master and Backup
Digital_Transfer_Option:
Offline_Option:
Offline_Media: Video cassette tape
Recording_Format: mini dv
Digital_Form:
Digital_Transfer_Information:
Format_Name: avi
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_optical_data.html
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20161103
Metadata_Review_Date: 20091202
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
CoRIS:
CoRIS_ID: 20091202010654
CoRIS_Children: None
CoRIS_Beginning_Date: 20040219
CoRIS_Ending_Date: 20040226
CoRIS_Metadata_Link: http://www.coris.noaa.gov/metadata/records/html/cred_toad_tutuila_oes0402_2004_mobilefauna.html
CoRIS_Tracking_ID: 4354